Two part feeder bowl



Feb. 24, 1959 I I w.-v. SPURLIN 2,874,667

TWO PART FEEDER BOWL Filed Sept. 25, 1957 2 Sheets-Sheet 1 INVEN TOR. f WILL/AM MSPUEL/U i H15 Afro/Quay Feb. 24, 1959 Filed Sept. 25, 1957 w. v. SPURLIN 2,874,667

TWO- PART FEEDER BOWL 2 Sheets-Sheet 2 M IHHH Fig.5

' -27 5O 2 ML E1 E5 INVENTOR. WILL/AM M SPuzuu H S A TraxauEY a-.. at,

. 2,3742??? rwo rxnr FEEDER BOWL yvnliam v. s urn Indiana, in;

This invention relates generally to feeder 'bowls and more particularly to the cori's'tiuction of thdbowlsof 1 these feeders.

Feeder bowls are fabricated from sheet metal and are also made of cast aluminum. The fabricated bowlshave a conical base and a cylindrical wall'. track is helical and is welded or oth erwise secured to ,the interior of the ey'nsanaai wall? The ldweh 21 5f-r e track is welded to th'eTIfa'cie' Tof 1th6"'c"oiiical'ilb tom" of the bowl. 16 helical traclois difficult to forrrras :it has ;the .slope of "a flat s'priii'g and iisTin'iieiF edge must be fastened to the inner face of the cylindrical bowl at spaced intervals but preferably continuously. This is difficult to do if the diameter of the cylindrical bowl is small and the spacing between adjacent track sections is limited. This type of bowl has considerable material that is not used directly in contact with parts being fed. The gauge of the metal must be such that it cannot flex or vibrate of itself. It must be rigid. It is made up of at least three if not more parts. The bottom is one part, the track can be a second part but it could be fabricated from several sections, and the cylindrical bowl is the last part.

The cast aluminum bowl has a materially greater amount of metal which merely fills in the exterior shape of the bowl. spiral track, rather than a simple helix, its exterior is either cylindrical or partly cylindrical and partly an inverted frustrum of a cone.

The principal object of this invention is the provision of the method of making and the construction of a feeder bowl. The feeder bowl comprising this invention is made in two parts. The base and the track are made from one integral sheet and the sides of the track that actually make up the bowl is fabricated from one continuous strip of metal welded to the cut edges forming the track. Fastening means are secured to the underside of the bottom to secure the bowl to the motor or base unit. The least amount of metal is thus used to construct this bowl. It is materially less than that of the previously fabricated bowl. This provides for a lighter bowl with good wearing metal such as steel of all kinds or aluminum and other nonferrous metals and alloys.

This method of construction is simple, economical and provides a natural assembly that produces a rigid but light weighted bowl.

Other objects and advantages appear hereinafter in the following description and claims.

The accompanying drawings show for the purpose of exemplificat-ion without limiting the invention or the claims thereto, certain practical embodiments illustrating the principles of this invention wherein:

Fig. l is a view illustrating a layout on a flat sheet.

Fig. 2 is a sectional view taken along the line 22 of Fig. 1. V

Fig. 3 is a view of a wall strip to be secured to the track helix which wall strip continues on the helix.

Although the cast aluminum bowl has a Fig. 4 is a view of a wall strip having a horizontal top.

Fig. 5 is a sectional view showing the completed bowl.

Referring .to the drawings, the metal .plate -l is provided with the ordinate and'abs'cissaconstiuction:lines -2 and 3 which cross at the center 4; A'series ofcenter points 5, 6, '7 and 8 are selected at equal radii from the center 4 and midway between the lines'2 .and"3ateach quadrant. The midposition in which each'bf these centers' is located would of course be on a line -that bise"cts the quadrant and is 45 P from each of the'1ines 2'and 3". The plate lmustbe' suflicientlylarge to de fine the extremities of the .bowl. As'fshown in Fig. -l -the"plate is larger than the layout lines. P

In order to layout the spiral track, a radius .is struck fromithe center 5 intersectingthe line "2 as indicated at '18. This radius forms thearc' 11 and is'continued-HY the increased radius 12 struck from tliecenterfihfortn ing the are 13 which vis further continued bylthe radius 14 struck from the' center 7 to formflthefla'rc 151fro1'n the line 2 to jthe-line3. The ;la st radius 16 constructs the are .17 from the line 3 to theline ,2 in he last quadr n mov i a e uuterc Qc w e di e io wh r he a 7 st uc f the nte .8 by th reel. sects ,the line 2' at a .givendistance indicated bet ee' e points v1 8 and ;20 that represent .the Idesird ,width I This .widthIis'ke'pt constaht as etwee'nthep 2'0a'nd 2l 'and along the line 2 as' 'th'e'layou'fis cohfinued.

Starting with the radius from the point 20 to the center 5 this radius 23 is used to strike the are 24 through the first quadrant. The radius 25 struck from the center 6 is used to form the arc 26 in the second quadrant and the termination is at point 22 on line 2 from whence the radius 27 from the'center 7 is used to strike the are 28 in the third quadrant and the radius 30 is used to strike the are 31 in the fourth quadrant ending at the point 21. This completes a full turn of the width of the track starting at point 18 and in order to have one and one-half complete turns of track for the feeder bowl, it is necessary to continue to scribe the helix by striking with the radius 32 from the center 5, the are 33 in the first quadrant and by the radius 34, the are 35 in the second quadrant ending at the point 36 on line 2. This completes the layout on the metal plate 1 and the scribed arcs on the plate are then sawed or otherwise cut following from the bottom of the plate 1 along the line 2 to the point 36 and the cutting the spiral starting at point 36 along the are 35 and continuing through the drawn spiral until the saw blade reaches the point 18 on the line 2. This provides a flat plate with a central portion 40 that has integrally formed therewith a helix in the form of the track 41 that starts at 42 at the plate 40 and ends at 43 between the points 22 and 36.

This flat plate with its integral helix in the form of the track 41 is placed between shaping dies which press the plate and the track into conical form such as illustrated in Fig. 2 which is a section view taken along the line 2--2 of Fig. l and shows the different points 18, 20, 21, 22 and 36 providing the track when cut from the plate 1 along the spiral line.

After this plate has been formed in the conical manner as illustrated in Fig. 2 the track 41 is extended so as to open the saw out following the spiral line. The wall member 44 as shown in Fig. 3 is then welded to the edges forming this saw cut with its point 45 starting at 18 and extending around the saw cut with the bottom edge 46 being welded to the bottom plate 40 from the point 18 around to the point 20 whence it leaves the bottom conical plate 40 and extends around the perimeter of the track following the saw cut around the spiral through point 21 and ending at point 36. The end of the strip 44 being sufficiently long so that its opposite end 47 terminates at point 36 of the track 41 as shown in Fig. 1.

The slope as illustrated at 48 in Fig. 3 indicates the initial slope given between the track 41 from the point Patented Feb. 24,, 1.953 r 18 to approximately one-third of the distance around the first section of the .spiral out after which the width of the strip 44 is of substantial uniform width as indicated at 50 along its upper edge. The upper edge 50 ceases to be welded to the track at point 21 which may be indicated'in Fig. 3 at 21. The upper edge 50 continues then tozbe free and forms the top surface of the bowl which top surface in the structure as shown in Fig. 3 spirals upwardly with the vtrack.

If a strip 51'such as illustrated in Fig. 4 was employed the starting point 45 and the slope 48 are substantially the same and the bottom edge 46 and the top edge 50 are also substantially the same. However at the end of the position 21 the strip is offset as indicated at 52 which permits the upper rim of the bowl to be horizontal rather than follow' the original helix of the track.

. As shown in Fig. a bottom 40 and the track 41 have the same pitch. However the helical'track has been extended so that the strip 44 may be welded to the opposite edges of the saw cut and the top of the bowl follows the slope of the track as indicated at 50.

Concentric mounting rings as illustrated at 53 and 54 are provided for securing the feeder bowl to the frame of avibratory motor. The mounting screw would normally pass down through the bottom of the feeder bowl and the inner mounting ring 53 for bolting the same in position. The mounting ring 53 is slightly higher than the bottom of the mounting ring 54 so that the mounting bolt will flex the conical bottom and thus function as a I tensioning means on the fastening bolt to lock the bowl in place.

I claim:

1. The method of making a feeder bowl comprising the laying out on a flat metal sheet a spiral line of the length equivalent to that of the desired length of the track to form the feeder bowl, cutting the flat sheet along the spiral layout line to make the spiral track independent from the bottom but attached integrally therewith, forming the sheet 'andthe. track into conical shape to produce a conical bowl bottom and sloping track, extending the spiral track upwardly to form a helix, and securing a flat strip to the adjacent edges of the extended track to form a bowl, and continuing the flat strip around the perimetral portion of the helically cut edge to complete the rim of the bowl.

2. The method-of claim 1 characterized in that said spiral layout line is laid out from quadrant points equidistant from and offset relative to the normal quadrant lines passing through a center.

3. The method of claim 2 characterized in that said quadrant points are gauged to determine the actual width of the spiral track.

References Cited in the file of this patent UNITED STATES PATENTS 2,696,292 Spurlin Dec. 7, 1954 

